CTM8251KAT

@@ -0,0 +1,50 @@+# CTM8251KAT++**VISOM** · CAN Bus Modules · DIP-7++CTM8251KAT from VISOM, in a DIP-7. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VCC | power_in | Positive power supply input. 3.3VDC nominal (3.15-3.45V range) for the CTM8251KAT variant. Typical quiescent current 46 mA; maximum operating current 130 mA. Absolute maximum -0.7V to +5V. |+| 2 | GND | power_in | Logic-side ground (power input return). Reference for VCC, TXD, and RXD. Galvanically isolated from the CAN-bus-side ground (CANG). |+| 3 | TXD | input | CAN controller transmit-data input from the host MCU/CAN controller. 3.3V-compatible logic (VIH >= 0.7·VCC, VIL <= 0.3·VCC). Drive current 2 mA typical. Dominant-timeout Tto(dom) = 0.3-12 ms (1 ms typ). |+| 4 | RXD | output | CAN controller receive-data output to the host MCU/CAN controller. 3.3V push-pull logic level (VOH >= VCC-0.4, VOL <= 0.4V at IRXD=4 mA). Output current up to 10 mA. |+| 6 | CANH | bidirectional | CAN bus high line, ISO 11898-2 differential output/input. Dominant level 2.75-4.5V (3.5V typ); recessive level 2-3V (2.5V typ). Bus pin withstand voltage ±36V DC, transient ±100V. |+| 7 | CANL | bidirectional | CAN bus low line, ISO 11898-2 differential output/input. Dominant level 0.5-2.25V (1.5V typ); recessive level 2-3V (2.5V typ). Bus pin withstand voltage ±36V DC, transient ±100V. |+| 8 | CANG | power_out | Isolated (bus-side) power supply ground reference for the CAN-bus side of the module. Optional connection point for cable shield (single-point earth) in shielded twisted-pair installations. May be left floating if unused. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | VISOM |+| Package | DIP-7 |+| Category | IoT/Communication Modules |+| Pins | 7 |++## Ordering variants++Same part, different packaging or reel option.++- `CTM8251KAT`+- `CTM8251KT`++## CAD (KiCad official)++- Symbol: `CTM8251KAT`+- Footprint: `Package_DIP:DIP-8-N6_W7.62mm`+- 3D model: DIP-7 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [VISOM datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895596661260288) (5 pp, sha256 `9a3b28d0dd28f73c`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ctm8251kat-datasheet.pdf)

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